<template>
  <div class="app-container">

    <el-card class="box-card">
      <!-- 表单查询 -->
      <el-form :inline="true" class="demo-form-inline">
        <el-form-item prop="courseTitle">
          <el-input v-model="course.courseTitle" placeholder="课程名称"/>
        </el-form-item>

        <el-form-item>
          <el-select
            v-model="course.status"
            clearable
            placeholder="课程状态">
            <el-option :value="'Normal'" label="已发布"/>
            <el-option :value="'Draft'" label="未发布"/>
          </el-select>
        </el-form-item>

        <el-form-item label="添加时间">
          <el-date-picker
            v-model="course.begin"
            type="datetime"
            placeholder="选择开始时间"
            value-format="yyyy-MM-dd HH:mm:ss"
            default-time="00:00:00"/>
        </el-form-item>
        <el-form-item>
          <el-date-picker
            v-model="course.end"
            type="datetime"
            placeholder="选择截止时间"
            value-format="yyyy-MM-dd HH:mm:ss"
            default-time="00:00:00"
          />
        </el-form-item>

        <el-button type="primary" icon="el-icon-search" @click="pageCourse(this.page)">
          查询
        </el-button>
        <el-button type="default" @click="resetData()">清空</el-button>
      </el-form>

      <!-- 表格 -->
      <el-table :data="list" border fit highlight-current-row>

        <el-table-column
          label="序号"
          width="70"
          align="center">
          <template slot-scope="scope">
            {{ (page - 1) * limit + scope.$index + 1 }}
          </template>
        </el-table-column>

        <el-table-column prop="title" label="课程名称" width="150"/>

        <el-table-column label="课程状态" width="80">
          <template slot-scope="scope">
            {{ scope.row.status === 'Normal' ? '已发布' : '未发布' }}
          </template>
        </el-table-column>

        <el-table-column prop="lessonNum" label="课时数" width="70"/>

        <el-table-column prop="price" label="课程价格" width="70"/>

        <el-table-column prop="gmtCreate" label="添加时间" width="160"/>

        <el-table-column prop="viewCount" label="浏览数量" width="60"/>

        <el-table-column label="操作" align="center">
          <template slot-scope="scope">
            <el-button
              type="primary"
              size="mini"
              icon="el-icon-edit"
              @click="updateCourseStatus(scope.row)">
              更改发布状态
            </el-button>
            <router-link :to="'/course/info/' + scope.row.id">
              <el-button
                type="primary"
                size="mini"
                icon="el-icon-edit">
                编辑课程基本信息
              </el-button>
            </router-link>
            <router-link :to="'/course/chapter/' + scope.row.id">
              <el-button type="primary" size="mini" icon="el-icon-edit">编辑课程大纲息</el-button>
            </router-link>
            <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeDataById(scope.row.id)">删除课程信息
            </el-button>

          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分页条 -->
    <el-pagination
      background
      :current-page="page"
      :page-size="limit"
      style="padding: 30px 0; text-align: center"
      layout="total, prev, pager, next"
      @current-change="pageCourse"
      :total="total">
    </el-pagination>
  </div>
</template>

<script>
import course from "@/api/edu/course";


export default {
  data() {
    return {
      course: {},
      list: [],
      page: 1,
      limit: 5,
      total: '',
    }
  },
  created() {
    this.pageCourse();
  },
  methods: {
    // 更改课程发布状态
    updateCourseStatus(data) {
      course.updateStatus(data)
        .then(res => {
          this.$message({
            type: 'success',
            message: '修改发布状态成功'
          })
          this.pageCourse(this.page)
        })
    },
    // 根据课程id删除数据
    removeDataById(id) {
      this.$confirm('是否删除课程数据', '提示', {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(res => {
          course.deleteCourse(id)
            .then(res => {
              this.$message({
                type: 'success',
                message: '删除课程信息成功'
              })
              // 刷新列表
              this.pageCourse()
            })
        })
        .catch(res => {
          this.$message({
            type: 'info',
            message: '已取消删除'
          })
        })

    },
    // 清空表单数据
    resetData() {
      // 清空表单数据
      this.course = {}

      // 初始化查询数据
      this.pageCourse()
    },
    // 初始化数据查询列表
    pageCourse(page = 1) {
      this.page = page
      course.pageListCourse(this.page, this.limit, this.course)
        .then(res => {
          this.list = res.data.rows
          this.total = res.data.total
        })
    }
  }
}
</script>

<style scoped>

</style>
